/* Shared reading controls for all case studies. */
.case-skip{position:fixed;left:16px;top:-90px;z-index:200;background:#fff8ec;color:#493b2f;padding:14px}
.case-skip:focus{top:12px}
.case-toc{position:sticky;top:70px;z-index:40;background:#f7f2e9f5;color:#493b2f;border-bottom:1px solid #9a836c40;backdrop-filter:blur(12px);padding:10px max(20px,calc((100vw - 1240px)/2));font:14px/1.6 'Noto Sans SC',sans-serif}
.case-toc summary{cursor:pointer;min-height:30px;font-weight:500;list-style-position:inside}
.case-toc summary span{margin-left:14px;font-size:12px;color:#7c6650}
.case-toc nav{display:flex;gap:6px;flex-wrap:wrap;padding-top:6px}
.case-toc nav a{color:#675643;text-decoration:none;padding:9px 12px;border-radius:4px;min-height:40px;font-size:13px}
.case-toc nav a[aria-current=location]{background:#e3d6bf;color:#493b2f;font-weight:600}
.case-toc a:hover{background:#ebe0cf}
body main>section[id],body main[id]{scroll-margin-top:180px}
body .case-scope-wrap{max-width:1240px;margin:24px auto;padding:0 24px}
.case-scope{padding:18px 22px;border:1px solid #a08a6a55;border-radius:4px;font:14px/1.85 'Noto Sans SC',sans-serif;color:var(--muted,#756650)}
.case-scope summary{cursor:pointer;color:var(--ink,var(--text,#493b2f));min-height:28px}
.case-scope p{margin:12px 0 0;font:14px/1.85 'Noto Sans SC',sans-serif}
.case-continue{max-width:1240px;margin:60px auto 40px;padding:32px 24px;border-top:1px solid #a08a6a55;font-family:'Noto Sans SC',sans-serif;color:var(--ink,var(--text,#493b2f))}
.case-continue>span{font-size:12px;letter-spacing:.08em;color:var(--muted,#756650)}
.case-continue .case-next{display:block;margin:20px 0 28px;padding:24px;background:#a08a6a13;border:1px solid #a08a6a50;color:inherit;text-decoration:none}
.case-next small{display:block;font-size:13px;margin-bottom:10px}
.case-next strong{font-size:clamp(22px,3vw,34px);font-weight:500;line-height:1.5}
.case-continue>div{display:flex;flex-wrap:wrap;gap:16px}
.case-continue>div a{padding:10px 0;color:inherit;font-size:14px;text-underline-offset:5px;min-height:44px}
.case-toc a:focus-visible,.case-continue a:focus-visible,.case-scope summary:focus-visible{outline:2px solid currentColor;outline-offset:3px}
body .evidence-trigger{display:block;width:100%;padding:0;border:0;background:transparent;color:inherit;cursor:zoom-in;min-width:0;position:relative}
body .evidence-trigger:focus-visible{outline:3px solid #b47b4b;outline-offset:5px}
.evidence-trigger::after{content:'查看大图 ↗';position:absolute;right:8px;bottom:8px;padding:6px 10px;background:#fff8eeed;color:#514335;font:12px/1.5 'Noto Sans SC',sans-serif;border:1px solid #9d826452;border-radius:3px;pointer-events:none}
body dialog.case-image-dialog{width:min(96vw,1440px);max-width:96vw;max-height:94dvh;height:auto;padding:0;border:1px solid #a38b6b;background:#f7f0e4;color:#493b2f;overflow:hidden}
body dialog.case-image-dialog::backdrop{background:#201c17d9;backdrop-filter:blur(4px)}
.case-image-toolbar{display:flex;align-items:center;flex-wrap:wrap;gap:8px;padding:12px 16px;border-bottom:1px solid #9d826440}
.case-image-toolbar strong{flex:1 1 200px;font:500 14px/1.6 'Noto Sans SC',sans-serif}
body .case-image-dialog button,.case-image-dialog a{position:static;inset:auto;padding:10px 12px;min-height:44px;border:1px solid #9d826460;background:#fff8ec;color:#493b2f;font:13px/1.5 'Noto Sans SC',sans-serif;cursor:pointer;text-decoration:none}
.case-image-stage{overflow:auto;max-height:72dvh;padding:16px;overscroll-behavior:contain}
body .case-image-dialog img{display:block;width:auto;max-width:100%;max-height:65dvh;object-fit:contain;margin:auto}
body .case-image-dialog.is-zoomed img{max-width:none;max-height:none;margin:0}
.case-image-dialog [role=status]{font:13px/1.6 'Noto Sans SC',sans-serif;padding:0 16px;margin:0 0 10px}
body .case-image-dialog button:focus-visible{outline:2px solid #8e6040;outline-offset:2px}
body .hero .meta small,body .eyebrow,body .index{font-size:12px;line-height:1.6}
body main figcaption,body main figcaption span{font-size:13px;line-height:1.7}
@media(max-width:700px){.case-toc{padding:8px 16px}.case-toc nav a{padding:8px 10px;min-height:40px}body main>section[id],body main[id]{scroll-margin-top:132px}.case-image-toolbar{padding:8px}.case-image-stage{padding:8px}.case-continue{margin-top:32px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto!important}}
body .diagram-trigger{display:block;width:calc(100% - 40px);margin:0 20px 20px;padding:12px 16px;background:transparent;border:1px solid currentColor;color:var(--muted,#665b50);font:14px/1.5 'Noto Sans SC',sans-serif;cursor:pointer;min-height:44px}
.diagram-trigger:focus-visible{outline:2px solid currentColor;outline-offset:3px}
.case-image-dialog [hidden]{display:none!important}
.case-diagram-preview{width:min(860px,100%);margin:auto}
.case-diagram-preview .evidence-card{opacity:1;transform:none;visibility:visible;cursor:default}
.case-diagram-preview .ux-state-sketch{min-height:260px}

/* Compact, shared chapter navigation; the menu does not push the article. */
body:has(>.case-toc){padding-top:52px!important}
body>header.topbar,body>header.nav{height:52px!important;padding:0 24px!important;gap:18px!important}
body>header .brand span{width:28px;height:28px}
body>header.topbar>a.case-back,body>header.topbar>a.back-home,body>header.nav>a.back-home{min-height:36px;padding:6px 12px;flex-basis:auto;font-size:13px}
body>.case-toc{top:52px;padding:0 24px;height:42px;box-sizing:border-box}
body>.case-toc summary{line-height:42px;min-height:42px;font-size:14px}
body>.case-toc nav{position:absolute;left:24px;top:100%;width:min(720px,calc(100vw - 48px));margin:0;padding:10px;box-sizing:border-box;background:#fffaf0;box-shadow:0 12px 24px #46332120;border:1px solid #d9cdb8;border-radius:0 0 10px 10px;max-height:35dvh;overflow:auto;gap:4px}
body>.case-toc nav a{font-size:14px;min-height:40px;padding:9px 12px;box-sizing:border-box}
body main>section[id],body main[id]{scroll-margin-top:110px}
@media(max-width:700px){body>header.topbar,body>header.nav{padding:0 16px!important;gap:10px!important}body>.case-toc{padding:0 16px}body>.case-toc nav{left:16px;width:calc(100vw - 32px)}}